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UC IPM Home > Antkey > Segments

How to Manage Pests

Key to Identifying Common Household Ants


Antennal segments

Ant antennae are elbow-shaped and divided into segments.
  • The second character used to distinguish ant species is the antenna.
  • Count antennal segments beginning with the scape, the longest segment.
  • The last 2 or 3 segments may be enlarged, forming a club.
  • Not all ant species have clubbed antennae.

12-segmented antenna with a 3-segmented club

10-segmented antenna with a 2-segmented club
3-segmented club
2-segmented club

Statewide IPM Program, Agriculture and Natural Resources, University of California
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